Core ONE Ligthbar

This is a lightbar that replaces the default in Prusa's Core ONE printer. It provides extensive customization and a visual progress indication of what the printer is doing.

I'm publishing the 3D models and firmware. So if you're proficient in soldering and firmware burning, you can print and assemble your own lightbar.

I'm not releasing the source code for the firmware, as this represents a large personal project.

If you're not into making this yourself and just want a lightbar that works, it's available for purchase at https://zeeq.store/products/zeeq-core-one-lightbar.

The latest firmware release will always be available at https://github.com/kelau/prusa-core-one-plus-lightbar-releases/tree/main/firmware.

To make the lightbar yourself, you'll need the following electronic components:

• ESP32-C3 development module with USB connector

• 5V WS2812B strip, 190 mm in length

  • Also supported are SK6812 (RGBW), SK6812 (RGBWW) and APA102 / SK9822

  • LED density can be 30, 60, 72, 120 or 144 LEDS per meter

• Three small pieces of very thin wire. Single core is recommended

For the external power supply, you'll need this:

• An XPM52C board with USB-C connector

• Two 40cm stranded AWG20 wires

• Two spade connectors

Tools needed for assembly:

• A fine tip soldering iron

• Fine gauge solder

• Steady hands ;-)

The DATA input for the lightstrip connects to GPIO4 on the ESP32. 5V and GND goes to the same on the ESP32 module.

Once you've built and programmed the lightbar, when powered up, it will allow you to connect to its access point named CORE-One-Lightbar. When you connect to it, the web ui will be available at http://192.168.4.1.

Have fun building!